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Doctor insights on: Excess Vitamin B12 Side Effects

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Dr. Paul Hartlaub
Board Certified, Preventive Medicine
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Dr. Su Fairchild
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Vitamin B12 (Definition)

Vitamin B12 is a vitamin which is a kind of nutritional agent ...Read more


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Do vitamin B12 supplements have any side effects?

Do vitamin B12 supplements have any side effects?

B12 Vitamin: Generally, there is no risk of toxicity from too much b12, however, if taken at same time with antibiotics for acne, such as tetracycline, it can lower effectiveness of the antibiotic. Some reported adverse events include allergy, fever, headaches, joint pains, upset stomach, swelling, dizziness. ...Read more

Dr. Paul Hartlaub
Board Certified, Preventive Medicine
28 years in practice
459K people helped
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Treating Hepatitis B (Checklist)

See your gastroenterologist
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Follow recommended therapy completely
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Notify your doctor if you're pregnant
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Get periodic repeat blood tests
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Should i consume tinospora cardifolia concentrate, as in 2010 i was diagnosed with itp and vitamin B12 deficiency? Does the herb has side effects?

Should i consume tinospora cardifolia concentrate, as in 2010 i was diagnosed with itp and vitamin B12 deficiency? Does the herb has side effects?

ITP: You really should discuss this with your hematologist who treated your itp and/or whomever follows you for this condition. I cannot personally recommend you to take an "herbal concentrate" since it is not monitored by the fda and side effects have been reported. ...Read more

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Taking Vitamins & Supplements (Checklist)

Schedule a followup visit with your physician to evaluate the effect
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My doc says im aneamic and has prescribed me dexorange syrup it has iron folic acid and vitamin B12 but im afraid will it giv me any side effects?

My doc says im aneamic and has prescribed me dexorange syrup it has iron folic acid and vitamin B12 but im afraid will it giv me any side effects?

Anemia treatmemt: Other than possible constipation, caused by iron, the syrup (s) your physician (p) prescribed will give harmless. Ask your p what you folate, iron and B12 values are. If they are normal, you will gain nothing by the s. Anemia can come from blood loss, either by GI or menstrual losses. If you iron (i) level is low, and you eat meat, consider one of those as the cause of your anemia. ...Read more

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Vitamin B12 pills benefits and side effaces??

Take only if needed: If you are vitamin B12 defecient, then a B12 supplement can help with anemia and nerve function. If you are not B12 defecient, the it will not help. Overdosing of Vitamin B12 can cause nerve dysfunction, diarrhea, and other side effects. My general advice is that if you do not have a vitamin defeciency, the a general multivitamin once daily is all that you need. ...Read more

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I have severe vitamin b12, d deficiency and at same time has excess production of sebum on scalp. Is both are related??And any other mineral for it??

I have severe vitamin b12, d deficiency and at same time has excess production of sebum on scalp. Is both are related??And any other mineral for it??

Unrelated: There is no direct relationship or association I am aware of between seborrhea (what you have) and B12 deficiecy. You are very young for being so B12 deficient. Do you not like LIVER, SALMON, TROUT, CLAMS, or BEEF? A mineral put into shampoos is selenium but I find that has variable effects. Check with a dermatologist for more information...and fix your B12 status...VERY IMPORTANT! ...Read more

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Dr. Paul Hartlaub
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